Originally Posted by Stuka
The locks on my '95 pathfinder have presented a slightly different problem. Sometimes the doors will lock themselves when you pull up on the handle. I don't know how to fix it.
It presented a big problem when my wife had the keys in the car, and she got locked out of it. The windows were up, the car was off, the keys were inside, it was a hot day in August, and one of the dogs was inside it. She couldn't get back in the house for the spare keys because she'd already locked the house. If somebody could tell me how to fix this I'd appreciate it. I had to replace a window she broke out to save the dog.
I hope she had the presence of mind to break the little window in a rear door to minimize the cost. And I hope the dog was grateful.
So to clarify, when all the doors are closed, and not locked, and you pull up on an outside (assuming a front door) door handle, all the doors lock. Something is sending a bogus "lock" signal. The problem is to sort out why this is happening.
The external handle is separate from the power lock system. Obviously the doors don't lock or unlock by using the external handle. The external handle connects mechanically to the lock mechanism, while the power actuator operates a rod connected to the inside lock knob, which has another rod to the lock mechanism. Or something equivalent to that.
Here's some things to try, with spare keys in hand:-):
Try pulling up on the other front door handle and see what happens. Does this happen when you open a rear door? This can isolate the problem to one door.
Does the system work ok otherwise? Does it make a difference if the engine is running?
If it's not isolated to one door, I'd suspect the power door module, but this really doesn't make sense unless you have a short that's triggered by movement.
If it is isolated to one front door, it's possible the lock's connecting rods are being moved by the handle mechanism. This might be the result of a loose clamp, or someone messing up the system by trying to jimmy the door. Have you had speakers or sound insulation installed?
So when you operate the outside handle, something pushes down on the rods etc. inside the door, and beyond a certain point of being moved, the actuator sends a "lock" signal to the rest of the system. This is the only way I can see this happening, since the outside handle has no electrical connections that I know of.